Seconded - with one further note:
Jiu-Jitsu is not the same as self-defence. I did proper self-defence classes as a lass, and they involved a lot of stuff about defensive pedestrianism (sensible routes, confident body language when walking, etc), talking your way out of a situation, and the cardinal rule of
"if all they want is your stuff, just give it to them, it's only stuff"
The physical aspects involved some martial arts moves, sure - but they were 99% blocks or ways to get out of grabs and holds (in order to leg it, not take on the attacker!).
Promote Jiu-Jitsu by all means, but as a sport, not a self-defence method.
And proper self-defence is well worth promoting, too.